an article when sold at a profit of 5% yields rupees 50 more than when sold at a loss of 5% what was the cost price of the artic
1 answer:
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<h2>Answer with explanation:</h2>
Let be the population mean.
For the given claim , we have
Null hypothesis :
Alternative hypothesis :
Since alternative hypothesis is two-tailed , so the test is a two-tailed test.
Given : Sample size : n=220 ;
Sample mean: ;
Standard deviation:
Test statistic for population mean:
By using the standard normal distribution table of z , we have
P-value ( two tailed test ) :
Since , the P-value is greater than the significance level of , it means we do not have sufficient evidence to reject the null hypothesis.
Answer:
a=-8
b=-29
Step-by-step explanation:
Let's assume
first number is a
second number is b
the difference of two numbers,a and b,is 21
so, we get
we can solve for 'a'
the difference of five times a and two times b is 18
so, we get
now, we can plug 'a'
now, we can solve for b
now, we can find 'a'